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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a085397e857b4c52aa2c439bd8813965bc0df744fd49a89fc8f4c4079cc32061' 
  AND token = 'YHuiwbMhjnHwrYuSVEH0t5B2TYI8Vzo0L4EScfOLD9w=' 
  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