Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f0b8897905a3298e9f98883bfe9589570809bb99c51091a58f7f198d4a7fabe' 
  AND token = '8zU/gj0RtpJNE+hWKaxKoTGF22Q5RF4YFH5t0mUFl6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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