hook_form_alter() on a view exposed filter form
This code should do it:

function MYMODULE_form_views_exposed_form_alter(&amp;$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  $view_ids = ['YOUR_VIEW_ID'];
  $view = $form_state-&gt;getStorage('view');
  if ($form_id == 'views_exposed_form' &amp;&amp; in_array($view['view']-&gt;id(), $view_ids)) {
    $form['field_new_used']['#attributes']['disabled'] = 'disabled';
  }
}