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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2fed8a6a6c7a6ace282918fefc60461f6bb26cf27aba2c7e2c6a8f0fb3a9886' 
  AND token = 'VnTmH0kxTKJJmvoRppNdVQZAm1uzIAADugi8DPrrdWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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