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 (
    82, 10, 9, 142, 59, 60, 62, 141, 27, 22, 
    23, 14, 13, 17, 18, 16, 56, 126, 51295, 
    117, 116, 115, 81, 11, 63, 51326, 135, 
    106, 105, 58, 57, 113, 51344, 120, 51345, 
    119, 51346, 118, 114, 108, 4, 5, 107, 
    6, 51348, 121, 51349, 122, 61, 51350, 
    123, 15, 51496, 51497, 51498
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00097

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "38.51"
    },
    "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": 55,
      "rows_produced_per_join": 55,
      "filtered": "100.00",
      "index_condition": "((`test_uchur_k`.`cscart_product_descriptions`.`product_id` in (82,10,9,142,59,60,62,141,27,22,23,14,13,17,18,16,56,126,51295,117,116,115,81,11,63,51326,135,106,105,58,57,113,51344,120,51345,119,51346,118,114,108,4,5,107,6,51348,121,51349,122,61,51350,123,15,51496,51497,51498)) and (`test_uchur_k`.`cscart_product_descriptions`.`lang_code` = 'ru'))",
      "cost_info": {
        "read_cost": "33.01",
        "eval_cost": "5.50",
        "prefix_cost": "38.51",
        "data_read_per_join": "250K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}