Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '442e9dc2e347a257f2d8a0f83a0892019996f98e5ee05a503db00eb2a5563524' 
  AND token = 'Cc8dlEtTl+g+7N36zumV9HUEUQbMgO/lc9drIVcIyEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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