Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '823089db0cf1848cd9717d512260b41b256c23f24a332f60a08ad816d6748191' 
  AND token = 'aEiYpD4OqTZUCN/+ph4J1FUa3YGbRnTyeYd7/ZGevTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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