Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4553232e070d2dffd7cafeceee3efd16750fcb4245ef9edf59821e06001503e1' 
  AND token = 'O8D2eHFBuY8bhFbTy8EZh49dZOfGbI3yxMrltfdHo9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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