Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '023d700a40b86bc7f5ecd95ed039ec0594b3c0f75b176ca7bc373161440ddf7c' 
  AND token = '/Xmv1gZYkmG9QUiWstdYLxnlMXgz4R0h4bf/oyB1Ysc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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