Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1f1da4b560a5d259515e12d0ce1ca9a785114e992459049866e0acf36c639df' 
  AND token = '0NzuoORUVDXKnPdLSrd485xC17o948gVT06NFLb3JhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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