Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e516f3e644b2a258f81a28684bf67223d200c64ad799ae5e5510bc4606baa629' 
  AND token = 'Wm/Jo8QHMxQRdXha/Kh5JQj+HbLs+QN/FRzL2Pnn3ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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