Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba7d7d4242b76fb658693b1cd3d1be4b0ba9202a50d5c93c077c980d074c6a87' 
  AND token = 'ZfAvwpDKtAqh83hFHt04DDM/cWH/G08WOSOLCjUUKWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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