Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc2071256736a9ae71707822a37708e5497f561989aa1ba14c32a4dbfb53a07d' 
  AND token = 'bRd7k2+cZ95XmGHVuXvwveOdp29stdRBpCt8Z0UhtH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}