SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '206d64f34ccaf440569c8ccb73ad0efa31cf9f888e06741b986295d13ff9a1be' 
  AND token = 'tjSLDmoY7ZBGHKhcgcYMjwVGqgoGw4v5cNxQlbCQdpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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