SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (
    44606, 44605, 31999, 40482, 40707, 40573, 
    32004, 40644, 40387, 40196, 40210, 
    40190, 40191, 38805, 38664, 31243, 
    32005, 39445, 39450, 39371, 38851, 
    35801, 31252, 36021, 37528, 30880, 
    30895, 30906, 30912, 30921
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'fr'

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "72.01"
    },
    "table": {
      "table_name": "cscart_ult_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id",
        "company_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code",
        "company_id"
      ],
      "key_length": "13",
      "rows_examined_per_scan": 30,
      "rows_produced_per_join": 30,
      "filtered": "100.00",
      "index_condition": "((`ea201_diorama`.`cscart_ult_product_descriptions`.`company_id` = 1) and (`ea201_diorama`.`cscart_ult_product_descriptions`.`product_id` in (44606,44605,31999,40482,40707,40573,32004,40644,40387,40196,40210,40190,40191,38805,38664,31243,32005,39445,39450,39371,38851,35801,31252,36021,37528,30880,30895,30906,30912,30921)) and (`ea201_diorama`.`cscart_ult_product_descriptions`.`lang_code` = 'fr'))",
      "cost_info": {
        "read_cost": "66.01",
        "eval_cost": "6.00",
        "prefix_cost": "72.01",
        "data_read_per_join": "114K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "company_id",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}