SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01095c6bb4bbf31a7d64c2f5ae372dd1b53126b1ad2ef4da3a425e0057f60a46' 
  AND token = 'nAfDC0Nx+3WaQzF83JrB5HlIMOWT4QK5pk96Fl/se4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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