Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4140854471ed6b751ae5e067d80c55fea5a079b17e03d5e5c89905e2024c675d' 
  AND token = '1J6BgmgRvUGfOXS8fNwgRd4i8Q5euI1Qcxs4j8JHwhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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