Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69f75fc3b3647fc8e867a2d1eef051551347da5f418832db4cdc05701f17a4b9' 
  AND token = 'Df2u7gTSRMwidh3YjywEaHH72y/287dobDlsx6TQBwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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