Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e532d1f53303e93dc394d5c7822db858e65a20bc9445750b1461275fd85a1e38' 
  AND token = 'kSAVTd3dAp/9VXYqN+aUge1rlEk2RaKrmWGa3htNCgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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