Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29f14f7eeae28768dc9e379f0fafb183531efda5ae2ec94d1aea78e7158d3692' 
  AND token = 'WdeYnKAz0Bmfe1csBgvIau6KoyA3FJE3uR7/U4ov5/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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