Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d33b0f7a1ac16274bfb43d668f7450fb101621bbd7e50bdff539d97ea443697' 
  AND token = 'B+RIVD2DuiayYrKTucdtC2pvH5kgKKQtYga58kFjEgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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