Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0d5477bc7d087f76e85b2709fc944a2a5a2d195a6a3513f26ad99522868b1c6' 
  AND token = '4/4cZ0wm8KIHq/D8WypPOpMUNoTM0KQJrUyaVhEQstk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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