Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3d6b0a9dbf4a8e344d635a68500ba4cf5bc010cf2219dfd1fe5ef151fd6c566' 
  AND token = '5h1bi62TL/O3EUik7fQpNsxVdpJuMXeKNB3yi9DFYJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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