Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8646f73635a78a07498df222e14d8976ae793b392a79d58d63a0382c7e98e575' 
  AND token = '/ENWtr5Ur0c5ZcqEo0bIYhJ1I/mgiDRejfPCGNSh/Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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