Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f771888d187788476d6517c3a6cdffec5a9e33dc44b2efcb360a857a6e25ebc' 
  AND token = 'eix2oGrFPntopBkFYmTKxk51yhrZ6oofahRi7AlkjAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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