Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db5bf18b1f45d067568e298b9700a650676890165a36211982280954b79a0f92' 
  AND token = 'RZVi5IQp+ko8EzrOddbPqSeDDolQRZtaxiiKRrVDBYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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