Metabox in Page Template

Step 01: Set pages as 'page' like follows:
'pages'       => array( 'page' ),
Step 02: While declare the metabox function, use this code:
  $post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'];
  $template_file = get_post_meta($post_id, '_wp_page_template',TRUE);
  if ($template_file == 'pricing.php') {
    ot_register_meta_box( $pricing_page_meta_box );
  }

//here pricing.php is the Template Page file.

Your Code should Look like this:
    $pricing_page_meta_box = array(
    'id'          => 'pricing_page_meta_box',
    'title'       => __( 'Our Service Custom Fields', 'theme-text-domain' ),
    'desc'        => '',
    'pages'       => array( 'page' ),
    'context'     => 'normal',
    'priority'    => 'high',
    'fields'      => array(
      array(
        'label'       => __( 'Page Title', 'theme-text-domain' ),
        'id'          => 'pricing_title',
        'type'        => 'text',
        'desc'        => __( 'Set Your Page Title Here', 'theme-text-domain' )

     ),
      array(
        'label'       => __( 'Page Sub Title', 'theme-text-domain' ),
        'id'          => 'pricing_sub_title',
        'type'        => 'text',
        'desc'        => __( 'Set Your Page Sub Title Here', 'theme-text-domain' )

     ),
      array(
        'label'       => __( 'Services Included Title', 'theme-text-domain' ),
        'id'          => 'include_title',
        'type'        => 'text',
        'desc'        => __( 'Set Your services inlcuded Title Here', 'theme-text-domain' )

     ),
      array(
        'label'       => __( 'Services Included Sub Title', 'theme-text-domain' ),
        'id'          => 'include_sub_title',
        'type'        => 'text',
        'desc'        => __( 'Set Your services inlcuded Sub Title Here', 'theme-text-domain' )

     )
   )
  );

  /**
   * Register our meta boxes using the
   * ot_register_meta_box() function.
   */
  $post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'];
  $template_file = get_post_meta($post_id, '_wp_page_template',TRUE);
  if ($template_file == 'pricing.php') {
    ot_register_meta_box( $pricing_page_meta_box );
  }
}