Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '285d418f909bb1cd4cbbadc9a12710b22c680fe4c256cb8cc12c38730db4f7e7' 
  AND token = 'Py6roL7afoXkd0PrSBtYSqW59wOYdmAupCh+m52QRq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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