SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9160b66a6bf5e8dfd93923fd917a57b3a58f311f50fc8e4c26fd9123e0137f22' 
  AND token = 'jgP09SVfmhL5SenSG1Hlp6dLqZiOebbuYPnBTn4w+8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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