ip-geo-block-headers

HTTP headers which this plugin sends when getting the remote content.

The filter hook “ip-geo-block-headers” assigns the array of HTTP headers which is passed to wp_remote_get().

$args
array( 'timeout' => 5, 'user-agent' => 'WordPress/4.8, ip-geo-block 3.1' )

The following code snippet in your theme’s functions.php can set timeout to 3 seconds.

function my_http_headers( $args ) {
    $args['timeout'] = 3;
    return $args;
}
add_filter( 'ip-geo-block-headers', 'my_http_headers' );

NOTE: When you select "mu-plugins" (ip-geo-block-mu.php) as Validation timing , you should put your code snippet into drop-in.php in Geolocation API folder instead of functions.php. See My custom functions in “functions.php” doesn’t work. in FAQ for detail.

1.1.1