Hello, there are two ways:
first is to increase max_execution_time and session.gc_maxlifetime settings in your php.ini file if you are going to perform such operations via phpMyAdmin in future;
second is to perform restoration via command line interface. To do it, you need to upload your archive via ftp or file manager, unzip it using the command
and restore itCode:unzip <archive name>
Please, note, that these operations should be performed logged as root user.Code:mysql dbname < dbdump.sql