Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ce93b734897c93c61b2927d57cdaf1680fcf79cc5ae42b725e1020c86df92c' 
  AND token = 'U6TwyEUugiclU0beUGjgjBfk33DMxnG/QyA1QWwDZYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}