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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ef35350a8cd966b6db61dd62a281c4150a9d0d656a94cf69398be157b5a157' 
  AND token = 'tMZ9iQgdTsWS1yRNHK1FS3WTVYHYl21vSNgwjO01Bvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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