SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    21839, 21840, 21841, 21842, 21843, 21844, 
    21845, 21846, 21847, 21848, 21849, 
    21850, 21851, 21852, 21853, 21854
  ) 
  OR sale_product_id IN (
    21839, 21840, 21841, 21842, 21843, 21844, 
    21845, 21846, 21847, 21848, 21849, 
    21850, 21851, 21852, 21853, 21854
  ) 
ORDER BY 
  updated_at DESC, 
  case_id DESC

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cscart_mb_salvage_cases.updated_at desc, cscart_mb_salvage_cases.case_id desc",
        "table": {
          "table_name": "cscart_mb_salvage_cases",
          "access_type": "ALL",
          "rows": 58,
          "filtered": 100,
          "attached_condition": "cscart_mb_salvage_cases.auction_product_id in (21839,21840,21841,21842,21843,21844,21845,21846,21847,21848,21849,21850,21851,21852,21853,21854) or cscart_mb_salvage_cases.sale_product_id in (21839,21840,21841,21842,21843,21844,21845,21846,21847,21848,21849,21850,21851,21852,21853,21854)"
        }
      }
    }
  }
}