Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaf551231aae7a29c0ab4910f8843cce1383c0edc204c4d7746136ac5605495a' 
  AND token = '7u+ll7VDnou+E1nDO7L0jaZ2/kY2Hqu3iQiJP+IsfL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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