Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca8d6d6f592e9a3682ae43b1e84af162fec19de2f4fb4b0d2c9def6fe08c4813' 
  AND token = '6DaWJXa5XEZ6x9ElQEj1v90zbWHPb7TXCArYZVnHscw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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