Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a19b834212eef100720626e633a1c5590c20ececa26639fc16e7ebcfba75bb88' 
  AND token = 'J4pkD94HukwXcbwdPkoAZUtbfHqL1VphBJs+eHbSVIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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