Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cc2c283114bd970189d055a7d2d73abbaa9a3245c135bb9b64199f3e56b6c26' 
  AND token = 'NqKJOT7N3Xqf2KeL/WOw7G9Wrw4tURrIcXHHA8Rg0Jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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