SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    21487, 21488, 21489, 21490, 21491, 21492, 
    21493, 21494, 21495, 21496, 21497, 
    21498, 21499, 21500, 21501, 21502
  ) 
  OR sale_product_id IN (
    21487, 21488, 21489, 21490, 21491, 21492, 
    21493, 21494, 21495, 21496, 21497, 
    21498, 21499, 21500, 21501, 21502
  ) 
ORDER BY 
  updated_at DESC, 
  case_id DESC

Query time 0.00036

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 (21487,21488,21489,21490,21491,21492,21493,21494,21495,21496,21497,21498,21499,21500,21501,21502) or cscart_mb_salvage_cases.sale_product_id in (21487,21488,21489,21490,21491,21492,21493,21494,21495,21496,21497,21498,21499,21500,21501,21502)"
        }
      }
    }
  }
}