Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98cf255ca9ac1d9b77ec79dc1f05eb61922f0f24a34f1eb4a211505d06ccb63a' 
  AND token = 's+nb5WSAIixwRRuZ/WPtmP4n1i2HiXUR7hEXCbvERNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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