SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '727a015f245d99872b135492d9091cfd270b5316ef9dc29d5b25247b778efc0e' 
  AND token = 'ERPU7D5wQPOjQFhx/Y8kntIWgYzK2vj1skT9aZmIWH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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