Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc1ef50f48dc3cd48f8066cae9ab5a75fafe9123acd320af5bd1c67a60cf6453' 
  AND token = 'qF78Hesy7BqPEpoNP+guwMBz9grx0WLzRiq9RFJpOPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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