SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95f0865edf5267ef6c7eb12299054838cd9bd573ccadcb0eeb1622157c1559f7' 
  AND token = 'UpZzNJWaaRycOyYKaxuXEICWrELw64YWFKT+Sx4VpgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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