Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3258daa5f780e265a6bd9fe07a703ab70ab829ef8574d612bc56d9b64b145f62' 
  AND token = 'iL0NEb6eA/oUd+/lMaPdUBDaVVvtlJaO+Ipq7ISGVwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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