The condition method does not take an array.

https://api.drupal.org/api/drupal/includes%21database%21select.inc/function/SelectQuery%3A%3Acondition/7

You need to separate condition to two calls, one per field, without passing them as an array:

    $query->condition('f.status', 1);
    $query->condition('f.country_value', 'Afghanistan');