Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2362ed47b107f3fd7034cf61bef4214cb87c038457e26557e4c49af32ee56ec9' 
  AND token = '6tD2ialp8cJBzpumDyx2gVKtSn7OqkSVCf6704ZtTsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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