Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '275d4d9cab8c88f79aa0081a8b0135045f02dfaec01b41513acf8c5bfd17812c' 
  AND token = 'jyXYNAkFqLHHesvIufDTJqotLTw55r6DLSQnWKTP/Cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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