Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cc8dfd636ef35774dd3c464a3682431ecb0e43770663a93cc1fb1bb47d94a9a' 
  AND token = 'NFXlwb1xXFztx8Sb/udnv+SaJu70BRCn7nCOxGyhurw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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