Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7332bbff4f28475188fb7865758f76870f6c4ef187c27df5b5f1feaef9883f49' 
  AND token = '5VePwSmrkd2yWa/xHG/xTbjVS05fmvM6vYN+E1BhUr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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