Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfdc7afabe77ab39a17e92b6da60a4ba3727e413d09d2fdb006a9b3536e0c30e' 
  AND token = 'xq8GH5CSv3syw9h5gTxi5n6z+/N/QpETsDtTlLW+kxs=' 
  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"
    }
  }
}