SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '109ae1fe19cf4b40db44b08f66d7919ef7ff453904cfbbb158d09d2319eea130' 
  AND token = '9R9s6tDuDTobOkv4zaewpt7yECF7tI633Rj+M6mXvO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables