How to Query Meta Key value ?

Let me explain with a simple example first :
I have created Custom Post Type named “events”
In that I have create a Meta Box named “moredetails”
And in that meta box, I have added 2 custom fields
1. event-type (radio buttons with value as “Upcoming Events” and “Past Events” )
2. event-picture (single file upload)

Now what would like to do is, I want to create archive page(listing page) where all events will be listed under 2 sections left-right side.
Left side : Upcoming Events (here all events having event-type = “Upcoming Events” value will be listed)
Right side : Past Events (here all events having event-type = “Past Events” value will be listed)

I would like to know how to Query these meta keys and compare the values?

Below is what I have done so far, but I that is not working :

$args = array(
                    'posts_per_page' => 100,
                    'post_type' => 'events',
                    'orderby' => 'ID',
                    'order' => 'DESC',
                    'meta_key' => 'event-type',
                    'meta_value' => 'Upcoming Event'
                );
                query_posts($args);

https://www.ads-software.com/extend/plugins/custom-fields-creator/