Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dacb6ddcc9804150b6ab65f67dd7351a03b5de4cd85f0bfbfb63736e695a223' 
  AND token = '6JmgKLbgdE+7bQ6/YPRDu9klxgaEC7mOlfJbS4SpVVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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