SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '94ffac5262a83d6f4bc6632dcb4a41af6937c98ffdb01ea3b867c78fad361b18' 
  AND token = 'TOfov+O0fVsK6Hxl1eYz/TPWTXIgQQDKRGciiHoKV7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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