Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0c1b4817957db512b184ede61d0e50a57014f918c53196988d0fb16eefb74de8' 
  AND token = 'fzaApi/zjgMJJFml5a5FHbpSUEC3ZaiRGiVtg6yd0Ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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