Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06b73a6a0646faa875aaa50d3b4ce809ec5e4b3cbaaf1efe4ad9b4a780d20c16' 
  AND token = 'DUv7lBSSYHNYzlVcwKb/fM+WuUfnBViHAnNOn+xsQTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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