Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d0b85017f9fef9b6d63e5d2854fab5d16aec586c5dcc1882ced781a05b7fbbe' 
  AND token = '0DPYCuZcpsRJcJjOFgRwM5qPzJCQIJRhUjavEkYAAhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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