Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99c886bd4c4b31cc29b13a2fc60ad6601de877557e5edfa0e1466dcc577645f2' 
  AND token = '7woQP5qAxxyVUYKtd8BR4y6sk07m22o5tyuv5+DlVj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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