Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac6ae77a51e9e89a351036368414a107fb6e7f7c69ba956b0d468bb10cd86328' 
  AND token = '2MITbkXVM1AlOTpTIAB+/PW9cHQ2w2tS1a+Gq4PzbDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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