Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d5aeb2419e0c67c54f283e963a38ea05248ecf3fd714a6c08157ffcae2c95a3' 
  AND token = '3IVKwEtuNg4deW1RD3IL4EKbKFokAT9eYtp7Xf/+pDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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