SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acfd3365cea2b78acc04e3ca6cc802cb9e5270f10019bd3640c22f2dbe849738' 
  AND token = 'K5jJCwXY5q4zRsViV75fQmBjWehHBKBHmZOywMaX/LQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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