Redirect – take away {custom} question string

I’ve an issue with some web page URLs.
The web page URL construction is like this:

www.instance.com/wp/custom-taxonomy/somepagename/?token=12345

I need that once I entry the URL above to redirect me to:

www.instance.com/wp/custom-taxonomy/somepagename/

In /wp/ is WordPress put in. I attempted this in .htaccess:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wp/
RewriteCond %{query_string} ^token=12345
RewriteRule (.*) /$1? [R=301,L]
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp/index.php [L]
</IfModule>

nevertheless it redirects me to:

www.instance.com/custom-taxonomy/somepagename

Any concepts?

Later edit:

/wp/ – the folder the place WordPress is put in;

/custom-taxonomy/ – a {custom} taxonomy, like /companions/ the place I enter all my companions.

/somepagename – a dynamic web page, like /xyz-ltd, /abcd... dynamic pages created for the {custom} taxonomy.

I can’t put a rule for each web page, would wish a basic rule to take away the question string.