SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '262df431f02980cff20ab6552b1b1c08893ff1971c0286306f190294287a5d8d' 
  AND token = '8OpZLMB/Xg6onfWiWVjbTuiP2LGz5Hr8phEyjkf8qCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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