SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3abab13ccb01fd9fe734567f3c95467bd12b79c45ebf373e7ca8ada491f2d9e9' 
  AND token = 'yFDutUFH9wLKWUZTwHHOJoO5HY/LXseujlVqsKablAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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