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 (
    87367, 87366, 87365, 87364, 87358, 87380, 
    87357, 87379, 82541, 82539, 82540, 
    82538, 89565, 89564, 92587, 92588, 
    92589, 93942, 93943, 93944, 93945, 
    93946, 93947, 95063, 95064, 95065, 
    95069, 95070, 95071, 95072, 95073, 
    95331, 95332, 95456, 95457, 95458, 
    95467, 95468, 95469, 95470, 95471, 
    96181, 96832, 96833, 96948, 96949, 
    96950, 96954, 96955, 96956, 96957, 
    96958, 98892, 98904, 100233, 100234, 
    100235, 100236, 100237, 100238, 100348, 
    100350, 100448, 100449, 101543, 101544
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00180

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "29.73"
    },
    "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": 66,
      "rows_produced_per_join": 66,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "23.13",
        "eval_cost": "6.60",
        "prefix_cost": "29.73",
        "data_read_per_join": "251K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (87367,87366,87365,87364,87358,87380,87357,87379,82541,82539,82540,82538,89565,89564,92587,92588,92589,93942,93943,93944,93945,93946,93947,95063,95064,95065,95069,95070,95071,95072,95073,95331,95332,95456,95457,95458,95467,95468,95469,95470,95471,96181,96832,96833,96948,96949,96950,96954,96955,96956,96957,96958,98892,98904,100233,100234,100235,100236,100237,100238,100348,100350,100448,100449,101543,101544)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}