SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0467ce22dbb3b82a06da3755ff0be2fcbddd20fa76ab7801f533685c144240a1' 
  AND token = 'oDX9JxoLoUQHHD52VyPGaKZYRXgkcsXqY15OLPhSy8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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