Avoid indexing of disabled Extbase records / pages

[MrMooky]

MetaSEO version: 2.1.0
TYPO3 version: 7.6.39
PHP version: 7.1.22

Is there any way to avoid the indexing of Extbase records / pages that are disabled in the backend? The problem is, the pages are accessible, but return a 404. Which is fine.

But they should not be indexed when they are disabled. How can I accomplish this?