Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce0c0cb3837b0804ea87a056a6d7f19ff751a7ae418fdac8cfa106892228c9f3' 
  AND token = 'UXQmd4sK0cBSyERpy6C1rSjxlMMBrkhyr+h5BFuIpzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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