Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b5c3a29fec44046b68e7569980a063ccc6bd5ae3088e0f333415092d9e677d0' 
  AND token = 'jdkFUFFngaHJoNS1IvkBtB8RwqW9wdnzRvWGQFCecrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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