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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95080bdae6be549e2f3c76708c65b7141a88a31915fec2e7cf2e60a504bcdf30' 
  AND token = '/9UgH17CTXmpnIurUwkJjCxu2slDC0P43mkabhBFnVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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