Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e755ac49f59a152c68ba1b68740d5f7a5b4d3e7dc6df4b4aefec1d026cfbefb' 
  AND token = '/vqoRn48F8PEdUmDOmv78GWdXOI3D3AHZmvEkXNOgPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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