More meta values in filtering posts

I am filtering posts that have only Sports Cars as mate value. However I need to add one more filter: meta key “active” to “yes”. How can I combine both filters in the same script?

<?php
	   $args=array(
     'post_type' => 'page',
     'post_status' => 'publish',
	   'caller_get_posts'=>1,
     'meta_key' => 'car_class',
     'meta_value' => 'Sports Cars',
     'order'=>'ASC',
     'orderby'=>'title',
     'sort_column'	=> 'post_modified',
	   );
	$my_query = new WP_Query($args);
	if( $my_query->have_posts() ) {
	  while ($my_query->have_posts()) : $my_query->the_post(); ?>