SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5254fc8cc84906217dc56203b4315d7529fb42b92cd6a85675225311fa1d7682' 
  AND token = 'sGheDwxv4ihwFVg26NabHkMo4pxzpDBNtQJAzaTzPAc=' 
  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"
    }
  }
}