Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3358c15612f66effb69e6c2c2f63342fe64eef9786c3984706e5df9b2e0a1ba' 
  AND token = 'gZxN/sexvnqmWVv4eJqPr0BcqKMQI6Q9sry17EbTB68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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