Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'add17b6912f442679d13e63201e01a6376ae4fcca7fb4459f7a4bf86704c9057' 
  AND token = 'YNi/M/ynyWPreSvkHlZIrBztQQszu8st5oULU+CZ6cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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