Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cfd099d2e787790f196b655d5aaa57c870def4051f018a0a32403e1e3dc6987' 
  AND token = 'UD2zXEVmeyPGCCVudmbHlrNJwIHUwNZY3YhCKEIodOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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