SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fd94b5462b8cd7238ad8251ff38f8fa60eb779067fd076055459405cea97429' 
  AND token = 'ujBPOifUWgcq3+gahbmX6pbNSiry2nYru4WKv1hxbnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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