Yes. Meta keywords and meta description are still effective to use in SEO as it help users and web crawlers to define the content of the web page of website.
Meta tags are short snippets of webpage text which describes your Website Page’s content. Meta tags are not visible on Webpage's content, but can be found in the Webpage's Source Code.
The answer is YES ! We can still us meta tag keywords and meta descriptions in on page SEO , Search engine robots find the web pages basicaly from their meta and tittle desctriction only