Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b85b1c666b15fce7ec17b7310458092f33d6237a2408ed1f7929d1221c608a3' 
  AND token = 'VVH8jfJ4DLjkjV2qxV+1vVkDme0B6nvti8WiiPG8o3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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