Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6505e8e3783ae4daa1de13db3a5f96d0fe41287e8bdae4b192bb1ceb5bf988df' 
  AND token = 'eATo55nroes7rH54TcSLSEnakVvEpL9aT/w6niqaNBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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