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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba9ae5b7ee1ab8916efe4ef4e81521228504ad8f38c43288f06b5ff624c0aeba' 
  AND token = 'FKtJPVNqlAQoFawtXBpiBtK3a3H25tWLaMaw69eX7as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

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