Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82ef92e09b546ea159c5eeeb784d3410fa3c06af785de3e42f673561ea5a08ff' 
  AND token = 'GjH5SAzyZVJKiVc6ok0KOFvVIEq7kx5dXW1VL/wQcSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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