Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fba19bae88f047a48fdd4af36b9f0a3dc74bb372bca776b3aa9048bf2888c564' 
  AND token = 'iuxnl6zXNeOzD0MPXvCwBcEvwlY4R68ngq7/7aZzUBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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