SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cd89b0b533685f54eaa0629eecaac2e060db909592d4819abb37b2ba7d10a77' 
  AND token = 'tTEr/yXGERgfk51C7HpBU6H/jrpYI3hUB+wbJ8PzCfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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