SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  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 (
    3773, 3774, 3775, 3776, 3777, 1143, 1139, 
    1140, 1141, 1142, 3681, 3682, 3683, 
    3684, 3685, 2207, 2208, 2209, 2210, 
    2211, 2212, 2213, 2214, 2215, 2216, 
    5808, 5809, 5810, 5811, 5812, 5813, 
    5814, 5815, 5816, 1654, 1655, 1656, 
    1657, 1658, 1659, 1660, 1661, 1662, 
    1663, 1664, 1665, 1666, 1667, 1668, 
    1669, 1670, 1671, 2220, 2221, 2222, 
    2223, 5353, 5354, 5355, 5356, 5357, 
    5358, 5359, 5360, 5361, 5362, 5363, 
    5364, 5365, 5366, 5367, 5368, 5369, 
    5370, 5820, 5821, 5822, 5823, 12916, 
    12921, 12876, 12896, 12900, 12909
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00200

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "84.86"
    },
    "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": 84,
      "rows_produced_per_join": 84,
      "filtered": "100.00",
      "index_condition": "((`test2_gaseus`.`cscart_product_descriptions`.`product_id` in (3773,3774,3775,3776,3777,1143,1139,1140,1141,1142,3681,3682,3683,3684,3685,2207,2208,2209,2210,2211,2212,2213,2214,2215,2216,5808,5809,5810,5811,5812,5813,5814,5815,5816,1654,1655,1656,1657,1658,1659,1660,1661,1662,1663,1664,1665,1666,1667,1668,1669,1670,1671,2220,2221,2222,2223,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363,5364,5365,5366,5367,5368,5369,5370,5820,5821,5822,5823,12916,12921,12876,12896,12900,12909)) and (`test2_gaseus`.`cscart_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "76.46",
        "eval_cost": "8.40",
        "prefix_cost": "84.86",
        "data_read_per_join": "383K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text",
        "unit_name"
      ]
    }
  }
}