Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '319339a9fee0e33ae68a49533f3d50b995a6959ed38d583beab06bc8d275bf72' 
  AND token = '96r6afZBTJ6lEwqacJJQbS9+vUsaoVPH4Z7VlkkwVpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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