The issue with using WP_Query

I have registered metadata for my posts, and the metadata is an array containing numeric elements, for example, [1, 3, 5]. I need to use WP_Query to retrieve a list of posts based on the condition that this metadata array includes a specified value, such as 5. However, the code I’ve written is not successfully fetching the post data, and I’m not sure where the issue lies. I hope you can help me take a look.

$query_args =  array(
  'post_type'  => 'work',
  'posts_per_page' => 10,
  'meta_query' => array(
    array(
      'key' => 'meta_key',
      'value' => 5,
      'compare' => '=',
    ),
  ),
);

$query = new WP_Query($query_args);