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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '056e9b53aac67cb2a5a7ca271b59c61ad47fe10c799b2e75182bf3e650419bf0' 
  AND token = '37oiMICfYppXiBuy5emIuD8SDsifEoM0M3h3yq9GgxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

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