Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4596c4e18e64da42ecb42150866b98827293bb954de0362bd3b8082ec485e20d' 
  AND token = 'tUTVFu32fmNp/8AHFfB7fe9dTBLMM6LLXRcKRbcfWik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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