Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccb9d342f7f52eea1545e5d7bb2a07f7c0102eed94cf8897426ef87ce77656b5' 
  AND token = '815WDUtkUa18dBb3cxfssvTVJ9jta1wRXb4Yr3xN3E0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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