SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '04fb0c7252f22bdc5a8de597efe4a3f3b547e1a543d53f2382ee86cc80a8d81b' 
  AND token = '4JqHnsWCSBnOU+oqKaywgGIt9LUWy5vuQB5UzgCvdmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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