Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f97b8ed849c98b9a42996b3768d7b51c31f2f82947358c95ea413a39f13d550' 
  AND token = '7Bs4OD/UXZlUF8L5k71nWrjEdWZQHkICj/iMCSLC2F0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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