Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94b6b567806a5d2ae7de2ae5e56559ac2ba4a75ca997cadd257f6d223839b391' 
  AND token = 'oPcs97HKrMqCd0TgXEiuqvY2+atcvbh2JIwoFwimFNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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