Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505c7cab389bb127868a90be01e547aee0caa458d12fa8c4659ce5dd2146e0a4' 
  AND token = 'mRlot0Llp85X5a9v8J2WOoB1yMY9SUDia+xBTXeUiZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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