Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '795e924c8598617a6066bf6ead61af0feb9c3fab334bf7c839662af4517acf1d' 
  AND token = 'FClrErCOTIrXhr2oOaw17PD3qVqt7rUI442d2f2myj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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