SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '625fee4f1b689d560fff1e04805cc4a85a0d129a2351146f797433d241f6f1b4' 
  AND token = 'tLxV49CwdYGtWMb5wSzBe/oW7jTGU5Mzt+RnvCJeHV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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