WordPress User Meta Query

I am keeping an array in a single user meta field that looks like this

array(
 'is_vip' => false,
 'all_contests' = array(
  'contest_id_1' = 32343,
  'contest_id_2' = 43437,
  )
);

I want to do a WP_User query that pulls users with is_vip == true. I've found examples but none that do comparisons with an array.

via Chebli Mohamed