Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e12717d975b151dc20d094c341eb0b943e9a368d13679264fba09e2e07f90280' 
  AND token = 'X3JTxB185hRKwge4WfE4KyWDLCqb/N/QQZ7Lz0BeDwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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