Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d25e9cb93161da48f0d9b59d12544f46caa493a80eb7508bd2ae72ba74659aa' 
  AND token = 'sysSra7qpZ7ci43SduoC74lAyFPYJadeb1mADoVoddk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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