Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a11d364a6a4df470bd026dd36f960db25605ce3b29d7ad132afc83497bbc2538' 
  AND token = '4mOAbZGNLZQZTmvsI1UpA9aRNFifQio2qYk4fmisThA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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