Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '68da3a85b635a4ae30637d92c18ffd1424143a75f779088a98c6ea80e7628800' 
  AND token = 'P9VfVTV4PV/aNdEyu7Mc7EdHWlxqHtkZ1+zWwm+GLrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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