Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cfd6d6e64481d093a98bb1c1de7eb7c2af0eccd70c116f2516343af2fe5a46c' 
  AND token = 'LZbIbT3jlxAqD5Gtlb9YjR+AiyI0gzQiykSJjLDzpiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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