SELECT 
  * 
FROM 
  cscart_mb_salvage_cases 
WHERE 
  auction_product_id IN (
    20829, 20830, 20831, 20832, 20833, 20834, 
    20835, 20836, 20837, 20838, 20839, 
    20840, 20841, 20842, 20843, 20844
  ) 
  OR sale_product_id IN (
    20829, 20830, 20831, 20832, 20833, 20834, 
    20835, 20836, 20837, 20838, 20839, 
    20840, 20841, 20842, 20843, 20844
  ) 
ORDER BY 
  updated_at DESC, 
  case_id DESC

Query time 0.00035

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 (20829,20830,20831,20832,20833,20834,20835,20836,20837,20838,20839,20840,20841,20842,20843,20844) or cscart_mb_salvage_cases.sale_product_id in (20829,20830,20831,20832,20833,20834,20835,20836,20837,20838,20839,20840,20841,20842,20843,20844)"
        }
      }
    }
  }
}