Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99b72fe6914e16ef7d4e2af24d0d641f9f655cb9700a2a607c5ccc462dc4f866' 
  AND token = 'FRemKwkWmpBBS4cE71goqy8qEDqRulsRv7VKnRvklLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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