Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '714d06a86f801f97f735fb4e9ae1090863f94607bbde1a72c46fc1beb5696605' 
  AND token = 'zn3IPVJc1Y/1ix/5UoFNVLxgf5HdjFo0ttf/Y1f/NzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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