SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0576432816b0354790b0927f7d8e847bb1f35821b828353c094b2fc27a3ef4cc' 
  AND token = '33nGwRKICwBOJBi3psErtkBITlg89AiVjlZTdztdev0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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