Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e443d811875959fed4d238d0f08cb76dc28e93298fcc65d873611b16a53edd7' 
  AND token = 'bi6tMt7ThQo8cIkZLRLTn2djv/tigGgnWqJLdqdw8dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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