Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d23f0852bcd5338d9aa17f040756bcb6799401c4cbb949412a0e126777305dc' 
  AND token = 'gNikoEL1CFy5dSsVDdAivgB71Gt4Rlp2ThGrnA27mjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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