Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e5a485353ed42ee7a6f8df15f1de129da545caa5eb5b6a699d2f6f956a3b72e' 
  AND token = 'SKZ1ObD4izxnZpnLH/NE5et7Xuq9ZYYCADGN08ZAcyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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