Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83de44ccf6e5138aa84001d9cb1c95c5032ba4c4697edea1bbf5be6088b86e67' 
  AND token = '7L9zS6H8wZOXqN43zKbfo8zJq+zjBwQvvCvE9SKZ4vI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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