Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '569c1583e0c3fce7e9fe2295c9fb4e210d8511d9fa1562ac1d084a66d2b5d519' 
  AND token = '5yR6brBt8/9/ekz6OrklBIluB4TlGG8jxrJ/tMWsofg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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