SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    21535, 21536, 21537, 21538, 21539, 21540, 
    21541, 21542, 21543, 21544, 21545, 
    21546, 21547, 21548, 21549, 21550
  ) 
  OR sale_product_id IN (
    21535, 21536, 21537, 21538, 21539, 21540, 
    21541, 21542, 21543, 21544, 21545, 
    21546, 21547, 21548, 21549, 21550
  ) 
ORDER BY 
  updated_at DESC, 
  case_id DESC

Query time 0.00026

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 (21535,21536,21537,21538,21539,21540,21541,21542,21543,21544,21545,21546,21547,21548,21549,21550) or cscart_mb_salvage_cases.sale_product_id in (21535,21536,21537,21538,21539,21540,21541,21542,21543,21544,21545,21546,21547,21548,21549,21550)"
        }
      }
    }
  }
}