Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12ed23b5d37761acf0b630d302f55765673e307c1a48f8e7f5bb3c577021016e' 
  AND token = 'uK9Z90dyl+RwEEredzd89kjq3INoUt07eDK+uNNjpQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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