Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '684255eff0ee40cead4b86806613b0fd90a7c02eab3664671613d6d3c78fcc1f' 
  AND token = '1t2zzI7vWJs9nL1WUg3so0FzhkwzU/YgfM50LQ+uzYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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