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 (
    93283, 93285, 93287, 93289, 93291, 94452, 
    94453, 94454, 94455, 94456, 94458, 
    94459, 94460, 94461, 94462, 94751, 
    94752, 94753, 94754, 94755, 94756, 
    94757, 94758, 94762, 94764, 95565, 
    95567, 95568, 95570, 95572, 95573, 
    95576, 95577, 95582, 95583, 95584, 
    95585, 95586, 95639, 95654, 95934, 
    95937, 95941, 96206, 96207, 96208, 
    96601, 96604
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00111

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "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": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (93283,93285,93287,93289,93291,94452,94453,94454,94455,94456,94458,94459,94460,94461,94462,94751,94752,94753,94754,94755,94756,94757,94758,94762,94764,95565,95567,95568,95570,95572,95573,95576,95577,95582,95583,95584,95585,95586,95639,95654,95934,95937,95941,96206,96207,96208,96601,96604)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}