SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '064932cbd2e84ac1a3cf9625f62395c089a6ec71c9b854d80b5ed7763908cacf' 
  AND token = 'XUJf1VMMYazNHGUkJHuA7/xW53Bm9vQUDwmHGx2EPn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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