Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c4fdd606653f7f6bdcc86d03daee1b7690afdcea9067b82047859427a1f84e3' 
  AND token = 'cReH+jYTEZOgMNwcoE79I1uRw1oIlLAEqpobOW/L2JA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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