Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '099ecb98b7b9834dac2a3c9e30adb838623d2f84d2e17a1f234e216baf3b8969' 
  AND token = 'ZTRspRsgs+upGnAstH1F84t2ocLP3XjhOIKcMVT8YLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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