301 Redirect with multiple paramater and doc type change

Hi all, I hope someone can help me here. I'm trying to do a 301 from/to the following urls. I will post what i have that is not working as well. Thanks much.

From

/store/cart/index.php?page=2&prod_id=4&category=20

Code (markup):

To

/products/blue/widgets/2.html

Code (markup):

My not working code

RewriteCond %{QUERY_STRING} ^page=2&prod_id=4&category=20$
RewriteRule ^store/cart/index\.php$ http://www.site.com/products/blue/widgets/2.html? [R=301,L]

Code (markup):

 

thanks for the code its hard to find the correct one.