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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    1517, 1518, 1519, 1520, 1521, 1522, 1523, 
    1524, 1525, 1537, 1538, 1539, 1540, 
    1541, 1542, 1543, 1544, 1545, 2217, 
    2218, 2219, 2735, 2863, 2864, 3729, 
    3732, 5220, 5221, 5222, 5223, 5224, 
    5225, 5226, 5227, 5237, 5238, 5239, 
    5240, 5241, 5242, 5243, 5244, 5817, 
    5818, 5819, 6322, 6448, 6449, 7494, 
    7495, 7498, 7499, 7504, 7505, 7526, 
    7527
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00082

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "67.44"
    },
    "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": 56,
      "rows_produced_per_join": 56,
      "filtered": "100.00",
      "index_condition": "((`gaseus`.`cscart_product_descriptions`.`product_id` in (1517,1518,1519,1520,1521,1522,1523,1524,1525,1537,1538,1539,1540,1541,1542,1543,1544,1545,2217,2218,2219,2735,2863,2864,3729,3732,5220,5221,5222,5223,5224,5225,5226,5227,5237,5238,5239,5240,5241,5242,5243,5244,5817,5818,5819,6322,6448,6449,7494,7495,7498,7499,7504,7505,7526,7527)) and (`gaseus`.`cscart_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "61.84",
        "eval_cost": "5.60",
        "prefix_cost": "67.44",
        "data_read_per_join": "255K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text",
        "unit_name"
      ]
    }
  }
}