Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26dc9f6e02ce99dff75f29d1a0bb548f495f956ff81fae172587d65d4086c27a' 
  AND token = 'HwvniVc/K7YpOBCKQkWvjsFzwfT1862kXQuyTdQ9u3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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