Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78b8595d8b32820e2b9265556fa12fbd6ea068d71149095f40667ec9a96598f7' 
  AND token = 'YaqavkdLSzyXUiExEp5h6QVoC2kv45vOf6GgEuP/x2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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