SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    10975, 5759, 1925, 11317, 10974, 11013, 
    11023, 11027, 11315, 11314, 11313, 
    11312, 11036, 11073, 11089, 11309, 
    11302, 10884, 11300, 11256, 11257, 
    11316, 10830, 11286, 11285, 11284, 
    11283, 3875, 11282, 10638, 10870, 11031, 
    11030, 10738, 11253, 11025, 11267, 
    11266, 11265, 11264, 11263, 11262, 
    11259, 11261, 10848, 10979, 11012, 
    11024, 11090, 11234, 11235, 11258, 
    11254, 11269, 10333, 11015, 11018, 
    11019, 11238, 11251, 11307, 11308, 
    11002, 10335
  ) 
  AND cscart_product_descriptions.lang_code = 'fr'

Query time 0.00082

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "153.61"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 64,
      "rows_produced_per_join": 64,
      "filtered": "100.00",
      "index_condition": "((`ea201_francemaqu`.`cscart_product_descriptions`.`product_id` in (10975,5759,1925,11317,10974,11013,11023,11027,11315,11314,11313,11312,11036,11073,11089,11309,11302,10884,11300,11256,11257,11316,10830,11286,11285,11284,11283,3875,11282,10638,10870,11031,11030,10738,11253,11025,11267,11266,11265,11264,11263,11262,11259,11261,10848,10979,11012,11024,11090,11234,11235,11258,11254,11269,10333,11015,11018,11019,11238,11251,11307,11308,11002,10335)) and (`ea201_francemaqu`.`cscart_product_descriptions`.`lang_code` = 'fr'))",
      "cost_info": {
        "read_cost": "140.81",
        "eval_cost": "12.80",
        "prefix_cost": "153.61",
        "data_read_per_join": "244K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}