Display Meta Box Value on Page Template

I added a metabox to a custom post type. It displays and saves fine on the dashboard. I am using the following code which displays the value fine on single.php

echo get_post_meta( $post->ID, '$prefix . 'linkurl', true );

This does NOT display/ work on a page template though. I can’t find documentation on how to display meta box values on custom page templates. Here is the loop I am using just in case.

<?php	$args = array(
			'post_type'=>'sponsors',
			'category_name' => 'sponsor-logos',
			'posts_per_page' => 1
		);
								$wp_query = new WP_Query( $args );?>
<?php if ( $wp_query->have_posts() ) : ?>
<?php while ( $wp_query->have_posts() ) : $wp_query->the_post();  ?>

<div <?php post_class() ?> id="post-<?php the_ID(); ?>">
<div class="thumbnail">
   <a target="_blank" href="<?php echo get_post_meta($post->ID, $prefix . 'linkurl', true); ?>">
<?php if ( has_post_thumbnail() ) { the_post_thumbnail( 'thumbnail' ); } ?></a>
<!--thumbnail--></div>
 <!-- post--></div>
<?php endwhile; ?>
<?php wp_reset_postdata(); ?>
<?php else:  ?>
<p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
<?php endif; ?>