Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea13064ef8d7879c8496314c029eebba0498b9fcc0b53b2efe6e6e0bb3b116a6' 
  AND token = 'jkeUS94XQ7G8KAlEMQtRmAdLZf5joga+LkmYZpUvhDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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