SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    21951, 21952, 21953, 21954, 21955, 21956, 
    21957, 21958, 21959, 21960, 21961, 
    21962, 21963, 21964, 21965, 21966
  ) 
  OR sale_product_id IN (
    21951, 21952, 21953, 21954, 21955, 21956, 
    21957, 21958, 21959, 21960, 21961, 
    21962, 21963, 21964, 21965, 21966
  ) 
ORDER BY 
  updated_at DESC, 
  case_id DESC

Query time 0.00037

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 (21951,21952,21953,21954,21955,21956,21957,21958,21959,21960,21961,21962,21963,21964,21965,21966) or cscart_mb_salvage_cases.sale_product_id in (21951,21952,21953,21954,21955,21956,21957,21958,21959,21960,21961,21962,21963,21964,21965,21966)"
        }
      }
    }
  }
}