SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bce6d7cae84730cc926956e5cd4f3e1b8710e592ae1087ff20d363fc9cad4f6' 
  AND token = 'wHHxtLp8xNEp54uEwDix9grQHuKbOPEdYipSopQ/XXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

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