Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a2c27782a32c5e6d6c6ba788f2a78c576eb82e214042422279fdf5c95d728e9' 
  AND token = 'YhaLrleHqH/zySft522LO6PgEQjwUFK3kzwxLU/88jU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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