Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a3ed377fc9be4be5bfbd59c600eb93f1596024ec1a5e49ffce497ee8c7c4c8e7' 
  AND token = '0z8SOCDfsa08hGSFyEON2JApcFWqz2xYLRN7YoeHRSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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