Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deeece85d95e4594b8a9815b8332a11af977ea93bda9fe27415f87771d1b9530' 
  AND token = 'IQDjpTLW9T4HLtBnR27bb2MQAzPm0lYRdABrGK95Nqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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