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 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    91627, 83923, 91905, 91906, 91907, 91908, 
    91909, 91910, 91911, 92556, 92557, 
    84268, 89735, 82422, 89379, 89394, 
    89396, 89343, 89385, 89375, 89376, 
    89381, 89289, 89390, 89392, 89344, 
    89382, 89388, 89380, 89395, 89397, 
    89410, 89411, 89412, 82423, 89341, 
    89290, 91945, 91946, 91947, 91948, 
    91949, 91950, 91951, 91904, 82420, 
    89360, 89286, 89387, 89342, 89363, 
    89377, 89365, 82354, 89359, 86235, 
    89435, 89288, 89386, 89383, 89297, 
    82417, 86852, 89362, 89364, 91921, 
    91922, 91923, 91924, 91925, 91926, 
    91927, 91929, 91930, 91931, 91932, 
    91933, 91934, 91935, 89378, 82371, 
    89433, 89434, 89296, 89391, 89393, 
    89406, 89408, 89407, 90843, 82421, 
    89441, 89302, 82399, 86848, 82414
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00181

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.24"
    },
    "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",
      "cost_info": {
        "read_cost": "33.64",
        "eval_cost": "9.60",
        "prefix_cost": "43.24",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (91627,83923,91905,91906,91907,91908,91909,91910,91911,92556,92557,84268,89735,82422,89379,89394,89396,89343,89385,89375,89376,89381,89289,89390,89392,89344,89382,89388,89380,89395,89397,89410,89411,89412,82423,89341,89290,91945,91946,91947,91948,91949,91950,91951,91904,82420,89360,89286,89387,89342,89363,89377,89365,82354,89359,86235,89435,89288,89386,89383,89297,82417,86852,89362,89364,91921,91922,91923,91924,91925,91926,91927,91929,91930,91931,91932,91933,91934,91935,89378,82371,89433,89434,89296,89391,89393,89406,89408,89407,90843,82421,89441,89302,82399,86848,82414)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}