Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ef825b3aee04c61b4d5635622c77c0590d6b9d6c00434f421a95f59c780a1c5' 
  AND token = 'gzFfpbjSwhZYl/Lt7W7f2NYe3TcWbAbux+3Cb+w3DeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}