Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04e125fe68a0dc71343ba1d0062d33c09207d4ccf9e4e4955c9314e900b19cea' 
  AND token = '+vdkJLVl/XgaVtSiDhVbI5TyfEchvqKrFPCse0+5Q80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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