Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '62b4a9af183cf40fbfe39133941bb496e8accbe40f237fc3f41967ef38814893' 
  AND token = 'b9t6383EUDvo279h+rR6wctv1G02bXqrEeuiQI/WxUY=' 
  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"
    }
  }
}