Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77efc5423791ca10507385728db21580055d9babe9cf1fd96ec41ec1f19e57a7' 
  AND token = 'mwSpJiXzZBpRnhPdD60cK/eJoAC/EfnxiHgv0Rpccrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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