Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2adc1cbf662a118b0298f9d4d752d2383b7cbbb34f645188990eaf3bc7f0bd80' 
  AND token = 'OEakqx/sHWiIITYWKe8Fu9TrBnHw23hHWuq+KY5tPYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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