Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009bb15835ce1dc13a7b602ef1d4a77a30242881b18d9aa9e3fb088a258b649c' 
  AND token = 'kyzCSvoIu2M2TiQh/4/8NjfK3k6TuRKIfe9gzyGYFy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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