Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a48169a05372109141cb6ec86494a5d582479ca988db70e411a9458ed870a8' 
  AND token = 'SnAo/4exlruztxsuO/PyouxXhy0Q9eztWBWyDw1uHj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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