Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '445246c5bb585c0d0d6d8b57c9f9b0785959e5a983ec6816239115d66aac5a1b' 
  AND token = '0kcQ1GhVwYK8rkVJQXhxde05uFILoKXNYOCwi2/ocj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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