Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf47c818467661ed57a458bd7094e56fb7ad970e30db6c7c7678b8a2d4a6cc9d' 
  AND token = 'Kv70a2SPBDrKkrmbyGM6K29C6roFpl1414L+h2UILn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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