Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd9c45c38b7abcae172d9560ff8aca6bf0e88f15da2bdc221d6d319519883e110' 
  AND token = 'aaRj2eIEQHPTPCt1HdSwFgmci3lfg05+wcWnk/zotTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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