SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b86eebce803140f10a28c582709970cc4dfa27e42d419183f84a07ead7e9fb5' 
  AND token = 'qCcPdm7MjePgtxwaXaTKBJCFhE8mIY9fNq4QhP/IHK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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