Consulta de registros ativos do Codeigniter levando muito tempo para carregar dados do banco de dados

public function get_count($table){
        return $this->db->count_all_results($table);
    }

    public function get_all_userdata($table, $where, $limit, $start){
        $query = $this->db->get_where($table, $where, $limit, $start);
        $data = $query->result_array();
        return $data;
    }

$where = array('status' => 0);
         //pagination
        $config['base_url'] = base_url('nonactiveusers');
        $config['total_rows'] =  $this->User_model->get_count();
        $config['per_page'] = 5;
        $config["num_links"] = 3;
        $config['uri_segment'] = 2;

        $config['full_tag_open'] = "<ul class='pagination'>";
        $config['full_tag_close'] ="</ul>";
        $config['num_tag_open'] = '<li>';
        $config['num_tag_close'] = '</li>';
        $config['cur_tag_open'] = "<li class='disabled'><li class='active'><a href='#'>";
        $config['cur_tag_close'] = "<span class='sr-only'></span></a></li>";
        $config['next_tag_open'] = "<li>";
        $config['next_tag_close'] = "</li>";
        $config['prev_tag_open'] = "<li>";
        $config['prev_tag_close'] = "</li>";
        $config['first_tag_open'] = "<li>";
        $config['first_tag_close'] = "</li>";
        $config['last_tag_open'] = "<li>";
        $config['last_tag_close'] = "</li>";

        $config['first_link'] = "<<";
        $config['last_link'] = ">>";


        $this->pagination->initialize($config);
        $page = $this->uri->segment(3); // your uri segment here
        $data['links'] = $this->pagination->create_links();
        $result = $this->User_model->get_all_userdata("users", $where, $config['per_page'], $page);

        $data['users'] = $result;
        $this->load->view('view', $data);