Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d30ac732c849b177666ccf9bbcd1eb25b403a478427c2188636d9d3cc9b073a' 
  AND token = 'KU8LfbsdsjkHD9QXwj7+DkrJj4LVwtfHoLh/cA/DV7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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