Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9829a14aad73d6849ae43f9b5d8e80341e07802c4eb828f159f461f58f9b63e0' 
  AND token = 'yShuckxxz/gWA9Wv4DLtxbG/pZh1JRLibsb/lKbEF0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}