Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '725f466532864334204f16c4b40ce5cb0d346c287ee1f336ed81b3c369c0cd73' 
  AND token = 'uC28GY0G9aEFh27CRwGwAw6zaK6SPbof+PisBctL4TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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