SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  IF(
    shared_descr.product_id IS NOT NULL, 
    shared_descr.product, descr1.product
  ) as product, 
  companies.company as company_name 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'fr' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ult_product_descriptions shared_descr ON shared_descr.product_id = products.product_id 
  AND shared_descr.company_id = 1 
  AND shared_descr.lang_code = 'fr' 
WHERE 
  1 
  AND companies.status IN ('A') 
  AND (
    products.amount > 0 
    OR products.tracking = 'D'
  ) 
  AND products.product_id IN (
    29915, 29914, 29912, 29911, 29924, 35814, 
    29910, 29909, 29903, 29901, 29900, 
    29904, 29905, 29907, 29906, 29925, 
    29926, 29943, 29942, 29944, 29946, 
    29948, 29947, 29938, 29931, 29928, 
    29927, 29933, 29899, 29898, 29863, 
    29861, 29854, 29864, 29865, 29869, 
    29868, 29867, 29866, 29852, 29845, 
    34633, 29870, 29891, 29893, 29882, 
    29881, 29875, 29874, 29873, 29872, 
    29876, 29877, 29880, 29878, 29779
  ) 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
GROUP BY 
  products.product_id 
ORDER BY 
  products.timestamp desc, 
  products.product_id ASC

Query time 0.00218

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "139.19"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "grouping_operation": {
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "companies",
              "access_type": "system",
              "possible_keys": [
                "PRIMARY"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.20",
                "prefix_cost": "0.00",
                "data_read_per_join": "5K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "status"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 56,
              "rows_produced_per_join": 1,
              "filtered": "3.19",
              "index_condition": "(`ea201_diorama`.`products`.`product_id` in (29915,29914,29912,29911,29924,35814,29910,29909,29903,29901,29900,29904,29905,29907,29906,29925,29926,29943,29942,29944,29946,29948,29947,29938,29931,29928,29927,29933,29899,29898,29863,29861,29854,29864,29865,29869,29868,29867,29866,29852,29845,34633,29870,29891,29893,29882,29881,29875,29874,29873,29872,29876,29877,29880,29878,29779))",
              "cost_info": {
                "read_cost": "134.05",
                "eval_cost": "0.36",
                "prefix_cost": "134.41",
                "data_read_per_join": "6K"
              },
              "used_columns": [
                "product_id",
                "status",
                "amount",
                "timestamp",
                "tracking",
                "company_id",
                "usergroup_ids"
              ],
              "attached_condition": "((`ea201_diorama`.`products`.`company_id` = '1') and ((`ea201_diorama`.`products`.`amount` > 0) or (`ea201_diorama`.`products`.`tracking` = 'D')) and ((`ea201_diorama`.`products`.`usergroup_ids` = '') or find_in_set(0,`ea201_diorama`.`products`.`usergroup_ids`) or find_in_set(1,`ea201_diorama`.`products`.`usergroup_ids`)) and (`ea201_diorama`.`products`.`status` = 'A'))"
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "membership",
                "src_k",
                "product_id",
                "lower_limit",
                "membership_id"
              ],
              "key": "membership",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "ea201_diorama.products.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "29.84",
              "using_index": true,
              "cost_info": {
                "read_cost": "1.79",
                "eval_cost": "0.11",
                "prefix_cost": "136.56",
                "data_read_per_join": "12"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`ea201_diorama`.`prices`.`lower_limit` = 1) and (`ea201_diorama`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "pt",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "ea201_diorama.products.product_id"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "1.07",
                "eval_cost": "0.21",
                "prefix_cost": "137.84",
                "data_read_per_join": "17"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "ea201_diorama.products_categories.category_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "1.07",
                "eval_cost": "0.01",
                "prefix_cost": "139.12",
                "data_read_per_join": "142"
              },
              "used_columns": [
                "category_id",
                "usergroup_ids",
                "status",
                "storefront_id"
              ],
              "attached_condition": "(((`ea201_diorama`.`cscart_categories`.`usergroup_ids` = '') or find_in_set(0,`ea201_diorama`.`cscart_categories`.`usergroup_ids`) or find_in_set(1,`ea201_diorama`.`cscart_categories`.`usergroup_ids`)) and (`ea201_diorama`.`cscart_categories`.`status` in ('A','H')) and (`ea201_diorama`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "shared_descr",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id",
                "company_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code",
                "company_id"
              ],
              "key_length": "13",
              "ref": [
                "ea201_diorama.products.product_id",
                "const",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.03",
                "eval_cost": "0.01",
                "prefix_cost": "139.16",
                "data_read_per_join": "208"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "company_id",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "ea201_diorama.products.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.03",
                "eval_cost": "0.01",
                "prefix_cost": "139.19",
                "data_read_per_join": "208"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}