Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '046243e8a072c7ff0d113fb804e7b84576385afe7c123228a9b976d3f902a76c' 
  AND token = '+20sfsbRY8p9B1Y3/3KK00OzX6EihGdVkK/sEHHsTNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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