SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa4ccee3b220fe6d1bf8fae9e6f0c7ff8e474e2f866ec5e91d661c4c808aa952' 
  AND token = '72gYBfRKw7XjKRRx0iLqkz9DB3asjmYVdbGWOzegPAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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