Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '299533cdfe3046f05f6b1e783ecb1b807988e15f216e887d5ee1c25ec920a4fa' 
  AND token = 'hM1yuZ2xZlGKFG+L/KrrrlgFsfcNRQhKO7NrnH8Wv0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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