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 (
    95928, 95929, 95930, 95931, 96490, 96491, 
    96492, 96493, 96494, 96495, 96496, 
    96497, 96498, 96499, 96500, 96501, 
    96502, 96503, 96504, 96505, 96506, 
    96507, 96509, 96531, 96532, 96533, 
    96534, 96535, 96536, 96562, 96563, 
    96630, 96631, 96632, 96633, 96634, 
    96635, 96636, 96637, 96638, 96639, 
    96640, 96641, 96642, 96643, 96644, 
    96645, 96646, 96647, 96648, 96649, 
    96650, 96651, 96652, 96653, 96654, 
    96655, 96656, 96657, 96658, 96659, 
    96660, 96661, 96662, 96663, 96664, 
    96665, 96666, 96667, 96695, 96696, 
    96697, 97581, 97743, 97744, 97745, 
    97746, 97747, 97748, 97749, 97750, 
    97751, 97752, 97753, 97754, 97755, 
    97756, 97757, 97758, 97759, 97760, 
    97761, 97762, 97763, 97764, 97795
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00153

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 (95928,95929,95930,95931,96490,96491,96492,96493,96494,96495,96496,96497,96498,96499,96500,96501,96502,96503,96504,96505,96506,96507,96509,96531,96532,96533,96534,96535,96536,96562,96563,96630,96631,96632,96633,96634,96635,96636,96637,96638,96639,96640,96641,96642,96643,96644,96645,96646,96647,96648,96649,96650,96651,96652,96653,96654,96655,96656,96657,96658,96659,96660,96661,96662,96663,96664,96665,96666,96667,96695,96696,96697,97581,97743,97744,97745,97746,97747,97748,97749,97750,97751,97752,97753,97754,97755,97756,97757,97758,97759,97760,97761,97762,97763,97764,97795)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}