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 (
    86891, 91868, 92227, 92210, 85554, 85577, 
    85570, 85576, 85584, 85543, 85592, 
    92239, 85571, 85573, 85574, 91877, 
    91878, 91879, 91880, 91881, 91882, 
    91883, 85555, 85594, 85564, 90025, 
    85575, 86889, 87888, 92185, 85561, 
    85591, 85597, 85600, 90755, 86893, 
    85553, 85556, 85557, 85559, 85589, 
    85593, 85601, 85602, 85560, 85587, 
    85588, 85604, 85562, 85542, 85603, 
    92475, 85547, 85569, 91876, 85545, 
    85568, 85544, 84237, 85548, 85558, 
    93282, 93283, 93284, 93285, 93286, 
    93287, 93288, 93289, 93290, 93291, 
    93294, 93338, 93339, 94428, 94452, 
    94453, 94454, 94455, 94456, 94458, 
    94459, 94460, 94461, 94462, 94750, 
    94751, 94752, 94753, 94754, 94755, 
    94756, 94757, 94758, 94759, 94760
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00167

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 (86891,91868,92227,92210,85554,85577,85570,85576,85584,85543,85592,92239,85571,85573,85574,91877,91878,91879,91880,91881,91882,91883,85555,85594,85564,90025,85575,86889,87888,92185,85561,85591,85597,85600,90755,86893,85553,85556,85557,85559,85589,85593,85601,85602,85560,85587,85588,85604,85562,85542,85603,92475,85547,85569,91876,85545,85568,85544,84237,85548,85558,93282,93283,93284,93285,93286,93287,93288,93289,93290,93291,93294,93338,93339,94428,94452,94453,94454,94455,94456,94458,94459,94460,94461,94462,94750,94751,94752,94753,94754,94755,94756,94757,94758,94759,94760)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}