SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de2bf98a6719bd3fb77417936dad92f80db0f0379e855d6b90d914b21cdc6914' 
  AND token = 'UPYw/K26JebgaBbq//xBK9Ec7J/5dXJZt6vjG+yZRrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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