Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f74305e01d76ac91222a9aedccfbfb03f00ce6aa2c50531268c25320f632a9a7' 
  AND token = 'QFqGlSwt9RH948eRkYIbYtqfmmCzvspiHJVdgR0Yd7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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