Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1e170a34568a8d2de899df5396f260a48ff3af8ddf95a7c8a513120be3a78ce' 
  AND token = 'fGIpxNyurGlfeLT2XGgyz9JXWP/jLJE0xpmSWAZftpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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