SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60a0018a222cc9d323cc63065367ac4c9dafeb7a1f5146ad0ba693aa84893c9b' 
  AND token = '6WOFiX+GcX7KJqD/of8R0ZB/g8L4THpKCqoyVH0Fdxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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