Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cb4dd2db984261fc90b59ccf9449809ba76f9563bb8b751b434e9f5f050e2fb2' 
  AND token = 'YTZ+YEdO0GmoRlqFKT+hDzHehKetD4BSe7YJ1ndDS78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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