Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '342acee53d9f9bcf375f77cea923475cc3304b70372d4f1f0aaec49dfd2aa645' 
  AND token = 'Lag3qnWXTTCmFBFsV2mBbOZVR3VXUwVeLv0kWbf/D3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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