Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fbfa7b004e985fa02ad02d52e956728043732e4275c3fb9a52b9e2ce3eaeb04' 
  AND token = '/zQMNQl0GYm4nAnJseNfqWx/w5UFRr6woohSIxzedb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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