Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '176c8907c4003b1b8f7365e6fc034cf005de6d37bb5108b1b4353b885b36e34d' 
  AND token = 'mO52AL77HB7XWNwq6X3lSqd2ZGCFIULRvepG5DAE6L4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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