Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2de3de15e7992d164411420e929c42a06cfc2706e08749b746b988f7fa3bea9a' 
  AND token = '/ffAomWFySHoSZhL/UT+wW8hKN9v7E0t+JU4ylh/xbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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