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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01fffbebf8a4da67dc827d3106c9bdd497a3ef645cf7d3bb5101f4c210e2fe38' 
  AND token = '/HWg1SZVhc7i7EKr5JvLHxvbgemzqSHytwsPkO5i0Iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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