SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    20797, 20798, 20799, 20800, 20801, 20802, 
    20803, 20804, 20805, 20806, 20807, 
    20808, 20809, 20810, 20811, 20812
  ) 
  OR sale_product_id IN (
    20797, 20798, 20799, 20800, 20801, 20802, 
    20803, 20804, 20805, 20806, 20807, 
    20808, 20809, 20810, 20811, 20812
  ) 
ORDER BY 
  updated_at DESC, 
  case_id DESC

Query time 0.00028

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 (20797,20798,20799,20800,20801,20802,20803,20804,20805,20806,20807,20808,20809,20810,20811,20812) or cscart_mb_salvage_cases.sale_product_id in (20797,20798,20799,20800,20801,20802,20803,20804,20805,20806,20807,20808,20809,20810,20811,20812)"
        }
      }
    }
  }
}