Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3437ebd8744a96d95443083b3415098b62ec017f89ed5c51d140ba270a795d65' 
  AND token = '2AcJfZiGmJYMHfIZRzdRxRC78Uc7ydPdoC/m+3zpqTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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