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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e05154d41a793581d716abb7c32d1b9386e0ed0a4551f9a59d49f5de4fcef642' 
  AND token = 'D2tincL41qI3VJxpLZjlIOkocbGGlosU/EUQ/Jt0s+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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