Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3155709b50521ad82acbc2d057e68f296419e479430efec169010cd4234d43f5' 
  AND token = 'SUmmOR1M8P7sioE6W8GduJ2JLNq+sax7cqYSiYaMVmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}