Set Wordpress auth/session cookie check interval and heartbeat interval.

session_check_intervals.php

// Set the authentication check interval in seconds.
add_filter( 'wp_auth_check_interval', 'auth_check_interval_filter', 99, 1 );
function auth_check_interval_filter ( $interval ) {
    $interval = 1;
    return $interval;
}
// Set the heartbeat interval in seconds.
function wb_set_heartbeat_time_interval($settings) {
 $settings['interval']=1;
 return $settings;
}
add_filter('heartbeat_settings', 'wb_set_heartbeat_time_interval');