Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c087eabd407eac2a996c5e9caf1abf080616382ba5eeaffe23c7e8cb8d11ec71' 
  AND token = 'HGAD9jnTvB3kFrCTeDURM53EyatlTKl89ZWlfqCD37s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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