Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c9f2ba7c8e81f902a1d7a1aed53768246ba4ab1c2fd81811183869943cdc750' 
  AND token = 'DbGZjom6yrqM7IjoUaXcj2+suipX5pU6MNJ6GdFoBS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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