Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaa639e480f89212781f8ecd9ae7c075c00e1d6de717c88565ae12a1ae1e104d' 
  AND token = 'luYiljjhetSAlVA1NRntnSPiu25T5EzTNZ0oDxEBO5o=' 
  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"
    }
  }
}