Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '492f97f23c765a389ba5d74c9e830500460bbca8a9779facc972d8be86925945' 
  AND token = '3JzNtgNPxF7WBox0RU8kaiOrsE8S4vlW384HpSxTVZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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