Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3933593a4079932c47f979a4ec44af9ab611db92948d6ebe35474e71d3d8504' 
  AND token = 'RjtqeFn4BgFsldIIxhnZ/aPYOzxRmD2KZbWCZeQB4u0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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