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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bb8008d1a9528e2189d79bc4c4aaac00213f7380f86a390b74a8762b46514e3' 
  AND token = 'o0POZ1lpL2cJvliOLT3K7jcIlNdb21Q9brYDvht7jqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

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