Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30a63773a197a14540bf0adcf5206e78e3279d7e2c8a97c35048c2a108566231' 
  AND token = 'mRn6WEKmrKkK42wGwjzBjQiEMY7HXRtdcdrSnWUuZMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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