Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1e908834369485f1f1de3144b9ac5b82c992cb4c2362be42258e23a9d3b96304' 
  AND token = 'Ar3p7Nag0MZvhzlOx3+S9UXb3LQT4TFG4ZSfRSgUaRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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