Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3bd0bc117bda6f2836327293e3b7b6d23f914af250af69a53ceb45f08c85402' 
  AND token = 'ZaJcq0bMLBpdEthfIED70GOp2XxwF6QZLmXWyG3qr3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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