Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd0b0b93994dce06b2a44e00c76269f55e8b6d0491d4996353548d6d79402077' 
  AND token = 'm2IwgJ60pu1jp6Zy900hte0jlbmjOBOLdBBVTCsc4dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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