Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b44d57eca18496880c83997c895aa02bf9b982e86b1e4b330bf6d0e4086e910' 
  AND token = 'Dhnu7rfiw7vy8xTvihDjH4V+ZSITJr1nmTons6dAnVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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