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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01fdd2ae245b8044d661ab6adb8cc70af636b895dcd9a11188226be06b791d76' 
  AND token = '2WjORj7oUqKEmUoUFo9rpOsgxe3Le/vgBI4gh0vkUKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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