Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ecfdc7c10741f618818b2019a265070803ccc0761ae153d56b3008746425180' 
  AND token = '0VWzu8InWLTbGmNjx691hAEwYUMTmu+ISUq42gefCBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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