Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b7dbbe44e8be1a45818fcdf710eee1377ea3cc01c628ae9bfe7d723953e05d6' 
  AND token = 'hzrXjZVl1wLzoIzND5qOsfwOsH7sgXeT77ok8+iKHo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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