Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4017c3558ee41f623af14258aa78175e99b752a6ca6598df3a7d352f75c2cdb0' 
  AND token = 'oyh25eriqRJ5rFCD12Lkx6GizUdPmnlItJ4Yp9a4vu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}