Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df52cb74d78f26909d0a092d57500eb9317cb0f807f0166be062294e85e673b7' 
  AND token = '2RwccERDQK/MyhYehIfexIdHHZrvbUiP7VD13hTKDj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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