Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f416960c500ee9f763da567ecc71d430a4926285f9a1af36da6f26b58736f98' 
  AND token = '4DDpE9GYcxC/UIJnFT0a6PEXeaWSqet0YQNtsc/ZhoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}