Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2a0d0d12e22fae066fb30d677ecc4f2416efcbd09b91c346343eaa2f1a2bd8d' 
  AND token = 'Ct7XDuidlMLMOfr8ikTfmy5pYSp0rYd72n6tuwvCXR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}