SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b02553d0f2a36696f1bfa9199f36f29481737b437bdfce8247f7506a41cb0a3d' 
  AND token = 'KLbBZzvdavtgFqSU1BFanZsQhZGuyzd6ayVmeCaSjug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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