Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24cfe4ddf908efb0b98aeaa72d9bda4ff51b87a51f5ee4429b03240186b84846' 
  AND token = 'kD9IQTZo3wjzO59zS9ii3XkcWLPxM+TPVqkr4C34bPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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