Ugh…sorry. Had that and still no go:
$args = array(
'fields' => 'ids',
'posts_per_page' => 1,
'post_type' => 'attachment',
'post_status' => 'any',
'meta_query' => array(
array(
'key' => 'image_meta_image_id',
'value' => $image_meta_image_id
)
)
);
$attachment_query = new WP_Query( $args );
$attachments = $attachment_query->posts();