Drupal 8 page template for view page
Since its an alias,

For Drupal 8 

In your THEME_NAME.theme file:

function THEME_NAME_theme_suggestions_page_alter(array &amp;$suggestions, array $variables) {
  // Checks for node pages. 
  if ($node = \Drupal::routeMatch()-&gt;getParameter('node')) {
    $current_path = \Drupal::service('path.current')-&gt;getPath();
    $alias = \Drupal::service('path.alias_manager')-&gt;getAliasByPath($current_path);
    $alias = ltrim('/', $alias);
    $clean_alias = str_replace('/', '__', $alias);
    $suggestions[] = 'page__'.$clean_alias;
  }
}


You would like to check out clive answer from here for drupal 7

Template file naming with alias