Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd56524e59eb2ce8f477a672f9c1bda5598eaeb87d0f057565620f7de08f93fb1' 
  AND token = '5Oxx30597Whyq8l6IzfU6Al+2y1WXj6FXWWe0HywkZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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