Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd038ad7c3977c917f4759bd02841f8a6a00a49a23235fa6f3dd7953604768857' 
  AND token = 'E+ndJ+MLfpXEZW6NSO1RYtmWZxicAnQFwPPb65AGHoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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