Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc07f16a46bea4173d1e28b9c7f6b62cc76b4bc79076b8708cc088d0f67977e4' 
  AND token = 'MN9oi6CRHN2T+51hdDRKKtjyVbk7AjrTJIOKWcImSUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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