SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22c248f8b960a43cc123b64fa2599b20235d6167db302796e51134dca1100ebf' 
  AND token = 'QZA6EnJsBtGkZhQG/qj61vO/GL9ptphu1QYd/nk2TT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}