Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8ba30406468f30e94ac5a4a9ea370b1834ac7bb0e4b6a63c85c501336d42ba0' 
  AND token = '20nWkX77CuI45EpBMW8Qoht9BDnGwbnFlt5jzuLukyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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