Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0bc29730353583265ce2d4f9381853eb7dd79bc76a80a7d201503bce296b895' 
  AND token = 'AFJf/eNcbN7Jf7Q+iR7+QNeqHG/18nqQQWRcTb1eQdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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