Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbb20ab1a264ccf10b02fa6320b567db7bc2be75b64eec8f9ee107e500b80160' 
  AND token = 'RAHVuP1K+IbxtqqiVPLs2ZwdxXlF0wBGif29kZxqc1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}