Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33987bf458732fe8801b084913e2afe2faf0e387b49aa234462e79544c68d340' 
  AND token = 'T07pvF96e/Ek0pDgIbAx9KOxRnXLc9XtZtYR3+ElFjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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