SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4158ac2409172b6dad3f98e5659102c1bfa60a7447c785add4601ab763626c67' 
  AND token = '0cOXTlEsdxHIiRZWX0h9KWePsYGmLGh0/nFwNqALFBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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