Apache ReWrite Rules .HTACCESS FILE

Hey everyone, new to the forum hope I'm posting in the right place.

I have MediaWiki installed on Apache on CentOS7. Everything works fine, but I need to rewrite URLs to make them shorter. Default path is http://mediawiki.my.domain/mediawiki/index.php/article, and I'm just trying to get them like this: http://mediawiki.my.domain/mediawiki/article

I edited LocalSettings.php on MediaWiki path with:

$wgScriptPath = "/mediawiki";
$wgArticlePath = "/mediawiki/$1";

And I also have and .htaccess file on /var/www/html with the following:

RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^mediawiki/(.*)$ mediawiki/index.php?title=$1 [PT,L,QSA]
RewriteRule ^mediawiki/*$ mediawiki/index.php [L,QSA]
RewriteRule ^mediawiki$ mediawiki/index.php [L,QSA]

So when I type http://mediawiki.my.domain/mediawiki I get a 404 Not Found

The requested URL /mediawiki/Main_Page was not found on this server.

Any ideas on what I'm doing wrong?