SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    21983, 21984, 21985, 21986, 21987, 21988, 
    21989, 21990, 21991, 21992, 21993, 
    21994, 21995, 21996, 21997, 21998
  ) 
  OR sale_product_id IN (
    21983, 21984, 21985, 21986, 21987, 21988, 
    21989, 21990, 21991, 21992, 21993, 
    21994, 21995, 21996, 21997, 21998
  ) 
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 (21983,21984,21985,21986,21987,21988,21989,21990,21991,21992,21993,21994,21995,21996,21997,21998) or cscart_mb_salvage_cases.sale_product_id in (21983,21984,21985,21986,21987,21988,21989,21990,21991,21992,21993,21994,21995,21996,21997,21998)"
        }
      }
    }
  }
}