Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25ff8cc1293cf64fdefff927af3d33eeb51adf28ca2466926563a91b99f28ba2' 
  AND token = 'Nfc2abXdjhJ0JCclDUcoEv1AfkZryYCkrfYlzd61o9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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