Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4a98f06e4d95279c296fe3d7f7eb293cab2ee14f5fcaa447be172c86e96ddfd' 
  AND token = '4ugxqidsMwQBJBNFpbLyNKB7njRTVIJ9nlJuzco4B0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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