Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34b645b2123855a2c754a2f1e627de4e12bbd7f1398a17e09880c8c4c309f34e' 
  AND token = 'AylK9JfNpwjUt0Wzvd0zOWv21jAQ/llyZ/nIDPisgAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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