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 (
    1697, 1698, 1699, 1700, 1701, 1702, 1703, 
    1704, 1705, 1706, 1707, 1708, 1709, 
    1710, 1711, 1712, 1713, 1714, 1715, 
    1716, 1717, 1718, 1719, 1720, 3733, 
    3735, 3736, 3737, 3738, 5371, 5372, 
    5373, 5374, 5375, 5376, 5377, 5378, 
    5379, 5380, 5381, 5382, 5383, 5384, 
    5385, 5386, 5387, 5388, 5389, 5390, 
    5391, 5392, 5393, 5394, 5395, 5396, 
    5397, 5398, 5399, 5400, 5401, 5402, 
    5403, 5404, 5405, 5406, 5407, 5408, 
    5409, 5410, 5411, 5412, 5413, 5414, 
    6728, 515, 3156, 3676, 5131, 13298, 
    13299, 13300, 13301, 13124, 13125, 
    13126, 13098, 13105, 13112, 13118, 
    13064, 13071, 13078, 13085, 13091, 
    3834, 3833
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00248

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "96.98"
    },
    "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": 96,
      "rows_produced_per_join": 96,
      "filtered": "100.00",
      "index_condition": "((`test2_gaseus`.`cscart_product_descriptions`.`product_id` in (1697,1698,1699,1700,1701,1702,1703,1704,1705,1706,1707,1708,1709,1710,1711,1712,1713,1714,1715,1716,1717,1718,1719,1720,3733,3735,3736,3737,3738,5371,5372,5373,5374,5375,5376,5377,5378,5379,5380,5381,5382,5383,5384,5385,5386,5387,5388,5389,5390,5391,5392,5393,5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408,5409,5410,5411,5412,5413,5414,6728,515,3156,3676,5131,13298,13299,13300,13301,13124,13125,13126,13098,13105,13112,13118,13064,13071,13078,13085,13091,3834,3833)) and (`test2_gaseus`.`cscart_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "87.38",
        "eval_cost": "9.60",
        "prefix_cost": "96.98",
        "data_read_per_join": "438K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text",
        "unit_name"
      ]
    }
  }
}