Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2be1b90ed620e401567a9d335b7bc7e60d6bf2ec9b7adb0f5fe246ad3182a07f' 
  AND token = 'apOUDtdW6RZ/2JUDIfUKduwzXclUOOh0ZPQpPRiqxaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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