Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce86d96c3cbed768d84c637bcea9fecaf62d57f1a3be29881b158e3ce9e28989' 
  AND token = 'SHyqeX1JpHj1d+lBp0luZIyad/JLbSq1Dv0i9VRtW/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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