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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4bee093394d605f83b96b5b2f9f60c4ad2ad4aba9f71c03b2176d1196bbc607' 
  AND token = 'ZTpzqzxeK6ww/d2MZpeRTjvpp8pwX+lrMSZe8FyI3o8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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