Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54079866b51be62f0f19b94c98da5d8de609a448e9d56ff7709203d76e599e79' 
  AND token = 'Kr2XowzyfMQ7ELOj9yLOz2JD9D8Amy7+/zU/9CncRco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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