Old 🔑 Key emoji is the picture of an essentially the same thing as in case of 🔑 Key emoji — but much more elegant and sophisticated. Also, it is rarely used in the meanings of privacy and safety. Instead, it is much more often seen in different symbolical meanings and also in relation to different fairytales and stories, where the certain keys play an important role.
Examples of using
“I have a key to your thoughts 🗝️”
“I like clockwork things 🗝️”