Laravel file upload timing out - adding chunk to updateOrCreate?

I'm trying to upload a users csv file and pass the data into a database but because the size of the csv / rows, it keeps timing out. The data must be checked to see if it's already in the database and update or create.

I have applied a chunk to the CSV for reading the data but didn't know if it's possible to add a chunk to the upload to database section?

Here is my function

public function import(Request $request) {

    if($request->file('imported-file')) {

        $path = $request->file('imported-file')->getRealPath();

        $data = Excel::filter('chunk')->load($path)->chunk(200, function($results) {

            foreach($results as $row) {

                if(!empty($row['postcode'])) {

                    $url = "http://ift.tt/1jxG3tJ".urlencode($row['postcode'])."&region=uk&key=";
                    $tmp = file_get_contents($url);
                    $xml = simplexml_load_string($tmp);

                    if((string)$xml->status == 'OK' && isset($xml->result[0])) {

                        $lat = 0;
                        $lng = 0;

                        if(isset($xml->result[0]->geometry->location->lat)) {
                            $lat = (string)$xml->result[0]->geometry->location->lat;
                        }
                        if(isset($xml->result[0]->geometry->location->lng)) {
                            $lng = (string)$xml->result[0]->geometry->location->lng;
                        }

                    }

                    Import::updateOrCreate(
                        [
                            'sitecode' => $row['sitecode']
                        ],
                        [
                            'sitecode' => $row['sitecode'],
                            'sitename' => $row['sitename'],
                            'address_1' => $row['address_1'],
                            'address_2' => $row['address_2'],
                            'address_town' => $row['address_town'],
                            'address_postcode' => $row['postcode'],
                            'charity' => $row['charity'],
                            'latitude' => $lat,
                            'longitude' => $lng,
                            'approved' => 1
                        ]
                    );

                } else {

                    // Postcode not valid!!!

                }


            } // endforeach

            Session::flash('sucess', 'Import was sucessful.');
            return redirect()->route('locations');

        });

    } else {

        Session::flash('error', 'Please select a file to upload!');
        return back();

    }

}

via Chebli Mohamed