Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '21a4b0ee49a5babd3b0c1840da3e4000ee27b82b666656d0b559c2255131441c' 
  AND token = 'cZopMYQ/ovGkuPWO9UIin8JGuzPnv0rXU8vn3jYkH18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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