Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '739828f0813425c1284ef76ee4793deaa9e5112dfa31507ec66de3c8a6df24ed' 
  AND token = 'B3Bhsk7cGTH34hDW2U7Jrunx47QOq06jjeGt3hgE/sQ=' 
  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"
    }
  }
}