Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9568674e7bd163918c762eefd6e96379e4594c500f319a111e895600b2d09fe7' 
  AND token = 'yQ+pwWyGCfTBB9ruhZDGE+vynAN4AoZlyT3skvptpbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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