SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '53a7955e01d526dab57e81f5f5c0f1c2ccb4c3e32ae7fa3b8ec3bb6671db64ab' 
  AND token = 'KXH+evWN/kghej/s7Ds4G3W2Ld9wmRMmKz2LBs28VDc=' 
  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"
    }
  }
}