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 (
    97614, 97615, 97617, 97618, 97620, 97623, 
    97625, 97629, 97630, 97631, 97633, 
    97635, 97636, 97637, 97639, 97640, 
    97641, 97642, 97643, 97644, 97645, 
    97646, 97647, 97648, 97649, 97650, 
    97651, 97652, 97653, 97654, 97655, 
    97656, 97657, 97658, 97659, 97660, 
    97661, 97662, 97663, 97664, 97665, 
    97666, 97667, 97668, 97669, 97670, 
    97671, 97672, 97673, 97674, 97675, 
    97676, 97677, 97678, 97679, 97680, 
    97681, 97682, 97683, 97684, 97685, 
    97686, 97687, 97688, 97689, 97690, 
    97691, 97692, 97693, 97694, 97695, 
    97696, 97697, 97699, 97700, 97701, 
    97702, 97705, 97706, 97707, 97708, 
    97709, 97710, 97711, 97712, 98054, 
    98055, 98056, 98057, 98058, 98059, 
    98060, 98061, 98062, 98063, 98064
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00160

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 (97614,97615,97617,97618,97620,97623,97625,97629,97630,97631,97633,97635,97636,97637,97639,97640,97641,97642,97643,97644,97645,97646,97647,97648,97649,97650,97651,97652,97653,97654,97655,97656,97657,97658,97659,97660,97661,97662,97663,97664,97665,97666,97667,97668,97669,97670,97671,97672,97673,97674,97675,97676,97677,97678,97679,97680,97681,97682,97683,97684,97685,97686,97687,97688,97689,97690,97691,97692,97693,97694,97695,97696,97697,97699,97700,97701,97702,97705,97706,97707,97708,97709,97710,97711,97712,98054,98055,98056,98057,98058,98059,98060,98061,98062,98063,98064)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
97614
97615
97617
97618
97620
97623
97625
97629
97630
97631
97633
97635
97636
97637
97639
97640
97641
97642
97643
97644
97645
97646
97647
97648
97649
97650
97651
97652
97653
97654
97655
97656
97657
97658
97659
97660
97661
97662
97663
97664
97665
97666
97667
97668
97669
97670
97671
97672
97673
97674
97675
97676
97677
97678
97679
97680
97681
97682
97683
97684
97685
97686
97687
97688
97689
97690
97691
97692
97693
97694
97695
97696
97697
97699
97700
97701
97702
97705
97706
97707
97708
97709
97710
97711
97712
98054
98055
98056
98057
98058
98059
98060
98061
98062
98063
98064