Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a33f3ea115a9621b23c9c9be71414a02eae7f296abbbad68bef8f2266572252c' 
  AND token = '2GETe1aVaofcPLoXaiCGvW+knJoFqFDxZX89+aPwvkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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