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SELECT 
  sd.param_id, 
  sd.param, 
  cscart_static_data_descriptions.descr, 
  sd.param_2, 
  sd.param_3, 
  sd.param_4, 
  sd.param_5, 
  sd.param_6, 
  sd.status, 
  sd.position, 
  sd.parent_id, 
  sd.id_path, 
  sd.class 
FROM 
  cscart_static_data AS sd 
  LEFT JOIN cscart_static_data_descriptions ON sd.param_id = cscart_static_data_descriptions.param_id 
  AND cscart_static_data_descriptions.lang_code = 'fr' 
WHERE 
  sd.section = 'A' 
  AND sd.status = 'A' 
  AND sd.param_5 = '2' 
ORDER BY 
  sd.position

Query time 0.01279

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "9.52"
    },
    "ordering_operation": {
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "sd",
            "access_type": "ref",
            "possible_keys": [
              "section"
            ],
            "key": "section",
            "used_key_parts": [
              "section",
              "status"
            ],
            "key_length": "6",
            "ref": [
              "const",
              "const"
            ],
            "rows_examined_per_scan": 21,
            "rows_produced_per_join": 2,
            "filtered": "10.00",
            "index_condition": "((`ea201_diorama`.`sd`.`section` <=> 'A') and (`ea201_diorama`.`sd`.`status` <=> 'A'))",
            "cost_info": {
              "read_cost": "2.80",
              "eval_cost": "0.42",
              "prefix_cost": "7.00",
              "data_read_per_join": "13K"
            },
            "used_columns": [
              "param_id",
              "param",
              "param_2",
              "param_3",
              "param_4",
              "param_5",
              "section",
              "status",
              "position",
              "parent_id",
              "id_path",
              "class",
              "param_6"
            ],
            "attached_condition": "(`ea201_diorama`.`sd`.`param_5` = '2')"
          }
        },
        {
          "table": {
            "table_name": "cscart_static_data_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "param_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "ea201_diorama.sd.param_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "2.10",
              "eval_cost": "0.42",
              "prefix_cost": "9.52",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "param_id",
              "lang_code",
              "descr"
            ]
          }
        }
      ]
    }
  }
}

Result

param_id	param	descr	param_3	param_4	param_5	param_6	status	position	id_path
33		Modélisme miniature	C:0:N	right	2		A	1	33
31	http://www.diorama.fr/architectes-miniatures-maquettes-architecture.html	Architectes	C:634:N	right	2		A	2	31
34		Vegetation	C:177:Y		2		A	3	34
35		Figurines	C:165:Y		2		A	4	35
37		Voitures véhicules	C:398:Y		2	N	A	5	37
38		Equipements accessoires	C:185:Y		2	N	A	6	38
39		Routes, tunnels, ponts, voies sncf	C:209:Y		2	N	A	8	39
40		Maisons, bâtiments	C:194:Y		2	N	A	10	40
42		Peinture, patines	C:204:Y		2	N	A	12	42
43		Outils, materiaux, colles	C:203:Y		2	N	A	13	43
44		Construction des volumes	C:226:Y		2	N	A	14	44
45		Maquettes, modélisme ferroviaire			2	N	A	15	45
46		Dameuses miniatures et chasses neiges	C:711:Y		2	N	A	17	46
36		Téléphériques	C:668:Y		2	N	A	18	36
47	https://www.diorama.fr/decors-pour-le-slot.html	Slot	C:712:N		2	N	A	19	47
26		Jouets miniatures	C:544:Y	right	2	N	A	20	26
22	https://www.diorama.fr/noel-neige-creches.html	Décors de crèches	C:264:N	right	2	N	A	30	22