Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '826bcde2d5981da934e73c3f973c48f8339c4ab388cc654651e639bdcbd48b53' 
  AND token = 'mIHMkiS1bT6mQadPgBy1w6Yg/VdUgzFZmqBgcMrKjow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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