Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3edcc1dc5de828a9e1bb8048480596075ebfc4bd7fb2d1668bc285e3d25cb509' 
  AND token = 'eXnD5eukk7A4MfkaoVqn4hozXqecS7wdeBAkBtHlBkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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