Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e28401e2421df12ba157a197f3eae2cf89dc218fdeccb6706ef8ff4958d4733b' 
  AND token = '3N7WdlwwkbHnZJHeB08EUDvKLDDJdmThocGOzMDNkKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}