Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5839154d6c1fe64f1fd85665bcd34ba6a75f15201454c2a2f7c9ba391291df3c' 
  AND token = 'aH+zCbvlDM2CGSHIkZuLTY1lxyX5QLxiWeiN3iP9nKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00108

JSON explain

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