Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14fbd40dc91621bc39baec673b7b525dad0c91cd2f964e217286f7d34e6a40fa' 
  AND token = 'CD0Ycyq5s/tL78TLwZ5OD3zdFyzY2xqOd6q7OZBLi1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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