Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d2c7ed3c5048f8621f3ccf4a967b8f722288fa9e989fc7ab14b28d4c62300bc' 
  AND token = 'KNPhnZ5ykeAPpCkF2GtXBqCDB8npGgGwdQFLnNRmHyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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