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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efd57beca8b723b80cbcf7465b1a0f9ee57b8b0d9bf42d33e423e90db69917eb' 
  AND token = '/ycqxCpieFupTA1XfFGEcB5VHpZy7JWwOeIfFF7X2WM=' 
  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