Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb64fbf260cb0d4940708a2d1b6badd075addf737790ec673a190e49d96518a5' 
  AND token = 'w90wl3JS22+TEbwu7xhRJZ2VBGXuMs9wDBozXRlH6Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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