Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f70c84e82db9564c0474fabc29016262c055ecd4c6f92a32347a3f9bc22f2184' 
  AND token = 'v6RUEtLxSX4XrbqCW3ecZrw4/ytwn9+fSqaKCKJB4pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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