Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f527216de5a1eefbc00751c7911205741fd1529366a621357937a83dace1a9b' 
  AND token = '7QVDHG66CEHY5YQHwoSU0hn/SV6LWq830S5XQ5b+MoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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