Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9361a5e58edc1a42f16677238f5341fc203b6607ed9279f3481d507c4efe40c7' 
  AND token = 'o708dr64jheRnSBEb0hyKej5efzpryF9Wd21/wd9v0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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