Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2b6c72e211b43d47a297febdee96cb6ed44a0014f6e9ca6285bfd457c2cef077' 
  AND token = 'JsgxVOzrECWT8kRsJU2NcM+RurXxN5MjlAyMvNKZAgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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