Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7081795c9090f14d98c7fef0f2455dc813d1f53ed77435926fc032f1b03b98e' 
  AND token = 'Yvr9ZA6feZDbm3AntjoC3Q5lELpJYxGIX+RFx/U8eXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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