Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbd008a382e0df0e5df0e81b755bc2a1f8c39155e12b6dd5f0fd3bbc14170b7f' 
  AND token = '0ho3nOQvIk5aVY58P7KNm0mXa4g25BgeJYBiG0qOTDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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