Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48e56755b93ff68faa199ea0e3fa6d48ac2cd756b6706f32233d5637806b155b' 
  AND token = 'AckIdUMpG0p5i/Gi7qJF3QyoogguRQdX5ltAPG1NcyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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