Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb511d56aeb6a8fa46e030493e016635547927e323b8f8891e2f4ce072fb7eae' 
  AND token = 'VoxJDZs5Jf9K+lBybAba/0vyC3KvSS3GhkrBeazlSgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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