Using "Advanced Custom Fields" checkbox fields in custom queries

I’m trying to write a WP_Query which uses some data from two ACF checkboxes as part of the arguments.

I found the documentation showing how to use fields in custom queries however I cannot work out what the correct syntax for my checkboxes is.

My ACF’s:

• Label: Promote to homepage?


• Name: promote_to_homepage


• Choices: Promoteto homepage : Promote to homepage


• Label: Make feature?


• Name: make_feature


• Choices: Show as feature : Show as feature (top of homepage)

This is the query I have:

$the_query = new WP_Query(
   array
      (
         'posts_per_page' => 1,
         'meta_key' => 'promote_to_homepage',
         'meta_value' => 'Promote to homepage',
         'meta_key' => 'make_feature',
         'meta_value' => 'Make feature'
      )
);

I guess what I can’t figure out is why data is actually needed for meta_key and meta_value. Is the key the label? Is the value one of the choices? Or do I need to use meta_value => true or something? I have tried many variations and cannot get it to work.

Essentially what I want to do is output the most recent post that is ticked true/yes for “Promote to homepage” and “Make feature”.

I have also tried:

array
   (
      'posts_per_page' => 1,
      'meta_key' => 'promote_to_homepage',
      'meta_value' => true,
      'meta_key' => 'make_feature',
      'meta_value' => true
)