Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e8e598d0e935641aa5893bfdab01ecbe134527b295bd7a99a19472e4fb389b3' 
  AND token = '0hipDGh3pf7IP0skkKBSo7nO2POm4I0rLiX6r6GTneg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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