SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5162b2018415bc092f7f7769e5cb841eddcc11a0005aaf296b88ad9edd65096' 
  AND token = 'aVxNShnRZrOJn8VPWgJzYBMC3Jf/zQIiakcmqS8FT4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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