Unlock delay for iPhone 6
There's no setting to delay the unlock, but what you could do is go to Settings > Touch ID &amp; Passcode, switch off Use Touch ID for iPhone Unlock, and then switch off Simple Passcode.

Switching off Use Touch ID for iPhone Unlock will disable your fingerprint's ability to unlock your phone, and switching off Simple Passcode will make you write a passcode that can be any length you want, with any characters you want. You can make the only way into your phone long/inconvenient enough to not be worth the hassle of typing on such a regular basis.