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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bee75c2b11bfae3b15becaa7d698bb99ab17a68028ec6ae6e95e080baf39aa6' 
  AND token = 'ncu9cb006S9ctQi88xc5YiotUwXq9QC443MAKIpNORY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

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