Ctrl + Enter	Execute query
Ctrl + Shift + Enter	Execute all queries
ALT + 1	Switch focus to 1st SQL Editor
ALT + 2	Switch focus to 2nd SQL Editor
ALT + 3	Switch focus to 3rd SQL Editor
SHIFT + TAB	Edit previous column during edit mode
TAB	Edit next column during edit mode
UP ARROW	Edit previous row during edit mode
DOWN ARROW	Edit next row during edit mode

Most of the the keys can be customized by editing the file "config/keys.php" in MyWebSQL installation folder.