Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f88e7131b9f95377de689e2ed6199fc0a480c3eec1f6b42e724598e971ab1ab' 
  AND token = 'T7pb1fa3AaCGmP0v3U2KhxnINg0B6Jsm/efaqKbIt+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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