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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bd08fb2b1e3b8096bbf7b086b140226f00753e401278b776963ba9120287589' 
  AND token = 'hcWnNZYQZnte8DtR2gxZQVN0u1owZceTfRt279AP3xg=' 
  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