Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7bb9d0b4682550a4ebece7d29f4546ff4d0abd599a4b2895e552f994dd1fe3a' 
  AND token = '3CpYo+DCKTOsN9f46B6sjcdH8AxzPjl474HHmo6wS5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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