SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9aabb582443e331eed3aa8b3df9164f857ff5fed4cd5e4306319c2e7781df4a2' 
  AND token = '+7A8BaM3y5p67jvrWVDLLV5uAmEJG+1ylPYzqKSDWdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}