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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aed113b5a33bc4ea8ba6ba0c639bcae896bfad9b6eadaef4102155325d6d5e3' 
  AND token = 'M92xnjMk1nvJcXHoBiTwlBmGR14zoXkFdmgrzeA72wA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

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