Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93d1671340e7f65da84e6a6b6f8c837d04b2ca7b081dc2923bd42d1515e2cb53' 
  AND token = 'YZnMaVSaYCT285tw0g6b0jZweU42g9wKpV502XJQMaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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