Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99f6697ee042848d0603465cbd49b6ad94a2222e67a3d91837ce865e0e80e069' 
  AND token = 'zk89MqREvBi17IxVRaG71oC8T3LOMRo5yMUtBZntNPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}