Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ee78152cfefdc550780cbca0c05c8c3d3dae65214c31d71f5927ee72dbd5dd5' 
  AND token = '1RfdaeHGEK315N47sl0Iw4h/XkXug0YYUoWXLGWqICw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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