O Aeroporto de Frankfurt opera uma via rápida para permitir conexões abaixo de 30 minutos:
Fast Lanes
What not everyone knows: when passengers are hurrying to catch a connecting flight at Frankfurt Airport they can take a shortcut to get to their gates faster. The airport has created “fast lanes” for this at the security checkpoints. They may be used on a priority basis by passengers whose flights leave in 30 minutes or less.
The fast lane system is very simple: display boards at the checkpoints list the current flights for which passengers may take advantage of the shortcuts. Friendly airport staff also help them get in the right line.
Both terminals at Frankfurt Airport now feature fast lanes everywhere that passengers cross from a non-Schengen to a Schengen zone or vice versa. For example, if they have arrived from Singapore and are continuing on to a destination within Germany or Europe.
Embora não especificado em nenhum lugar, eu suspeito que isso só será aplicado se você despachar sua bagagem (ou se você não tiver nenhuma bagagem despachada).
Definitivamente, vale a pena entrar em contato diretamente com o aeroporto para confirmar.
Disclaimer: Eu não tenho nenhuma experiência com isso.