Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4999ae69ee82eaba9d448c5754bf29c8f609923a86ab664fe5b43c4658d449c' 
  AND token = 'OwqLcycpRe1QqiCyd7WbCq1fnk+GcHqaBvBJZwo+z8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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